Information processing apparatus, information processing method, and computer-readable storage medium

An information processing apparatus comprising:

• a processor configured
• to produce temporary high-resolution image data of a second resolution higher than a first resolution based on image data of the first resolution,
• to sequentially set a predetermined number of pixels in the image data of he first resolution as target pixels one by one,
• to detect an edge of each target pixel,
• to perform a self-congruity point extraction processing for searching for corresponding points in image regions which approximate a change pattern of pixel values of a target region including the target pixel from the image data of the first resolution when the edge is detected, and
• to repeatedly perform a sharpness enhancement processing for the temporary high-resolution image based on the target pixel of which edge is detected and corresponding points corresponding to each target pixel of which edge is detected,
• a detector configured to detect an angle of a detected edge to determine whether the detected edge is one of vertical and horizontal edges or an oblique edge, and
• a controller configured to control the processor not to perform the self-congruity point extraction processing and the sharpness enhancement processing when the detected edge is the one of vertical and horizontal edges, to control the processor to perform the self-congruity point extraction processing and the sharpness enhancement processing when the detected edge is the oblique edge, and to control the processor to perform the sharpness enhancement processing by a number of times which depends on an angle of the oblique edge when the detected edge is the oblique edge.

An information processing apparatus comprising:

• a processor configured
• to produce temporary high-resolution image data of a second resolution higher than a first resolution based on image data of the first resolution,
• to sequentially set a predetermined number of pixels in the image data of the first resolution as target pixels one by one,
• to detect an edge of each target pixel,
• to perform a self-congruity point extraction processing for searching for corresponding points in image regions which approximate a change pattern of pixel values of a target region including the target pixel from the image data of the first resolution when the edge is detected, and
• to repeatedly perform a sharpness enhancement processing for the temporary high-resolution image based on the target pixel of which edge is detected and corresponding points corresponding to each target pixel of which edge is detected,
• a detector configured to detect an angle of a detected edge to determine whether the detected edge is one of vertical and horizontal edges or an oblique edge, and
• a controller configured to control the processor to perform the sharpness enhancement processing by a number of times which depends on an angle of the oblique edge when the detected edge is the oblique edge wherein the number of times of repetitive operations of the sharpness enhancement processing when the detected edge is the one of vertical and horizontal edges is less than the number of times of repetitive operations of the sharpness enhancement processing when the detected edge is the oblique edge.

An image processing method comprising:

• producing temporary high-resolution image data of a second resolution higher than a first resolution based on image data of the first resolution,
• sequentially setting a predetermined number of pixels in the image data of the first resolution as target pixels one by one,
• detecting an edge of each target pixel,
• performing a self-congruity point extraction processing for searching for corresponding points in image regions which approximate a change pattern of pixel values of a target region including the target pixel from the image data of the first resolution when the edge is detected,
• performing a sharpness enhancement processing for the temporary high-resolution image based on the target pixel of which edge is detected and corresponding points corresponding to each target pixel of which edge is detected, and
• stopping the performing of the self-congruity point extraction processing and the performing of the sharpness enhancement processing when a detected edge is one of vertical and horizontal edges.

A computer-readable storage medium configured to store program instructions for execution on a computer system enabling the computer system to perform:

• producing temporary high-resolution image data of a second resolution higher than a first resolution based on image data of the first resolution,
• sequentially setting a predetermined number of pixels in the image data of the first resolution as target pixels one by one,
• detecting an edge of each target pixel,
• performing a self-congruity point extraction processing for searching for corresponding points in image regions which approximate a change pattern of pixel values of a target region including the target pixel from the image data of the first resolution when the edge is detected,
• performing a sharpness enhancement processing for the temporary high-resolution image based on the target pixel of which edge is detected and corresponding points corresponding to each target pixel of which edge is detected, and
• stopping the performing of the self-congruity point extraction processing and the performing of the sharpness enhancement processing when a detected edge is one of vertical and horizontal edges.